Spinnerette



April 6, 1965 w. H. DAVIS, JR 3,176,342

SPINNERETTE Filed June 25, 1962 IN VEN TOR.

WALTER H. DAVlS,Jr. FIG. 3.

hwimg ATTORNEY United States Patent 3,176,342 SPENNERETTE Walter H. Davis, Jr., Decatur, Ala, assignor to Mon- This apparatus relates to spinnerettes and more particularly to spinnerettes for forming conjugate filaments.

One of the conventional conjugate spinnerettes is the type wherein a knife edge bisects a hole in the spinnerette plate. Different spinning solutions are advanced to and through the hole from opposite sides of the knife edge, the knife edge serving to meter the two solutions so that a conjugate or composite filament is formed. One of the disadvantages of this spinnerette is that the flat spinnerette plate bulges under the applied pressure and separates from the knife edge, thereby rendering the metering of the two solutions somewhat inaccurate. With this in mind, one of the objects of this invention is to provide a novel and improved spinnerette.

Another object of this invention is to provide a conjugate spinnerette which is stable under pressure applied by the spinning solutions.

A further object of this invention is to provide a conjugate spinnerette having a spinning plate which cannot separate from a knife edge which meters two spinning solutions to a spinning orifice.

Still another object of this invention is to provide a conjugate spinnerette having spinning orifices at the apex of a V-shaped ridge or corrugation.

One embodiment of the present invention contemplates a conjugate spinnerette wherein a knife edge extends to and touches the apex of a V-shaped ridge or corrugation in a spinnerette plate, the plate being provided with a plurality of spinning orifices positioned at the apex of the V and bisected by a knife edge. Different spinning solutions are fed to and through the orifices from opposite sides of the knife edge, thereby forming conjugate or composite filaments. The V-shaped configuration of the spinnerette plate prevents bulging and separation from the knife edge.

Other objects and advantages will become apparent when the following detailed description is read in conjunction with the appended drawing, in which FIGURE 1 is a perspective view of one embodiment of the invention showing the general arrangement of the spinnerette plate,

FIGURE 2 is a cross sectional view of the spinnerette showing the positioning of the V-shaped corrugations in the spinnerette plate relative to the knife edges, and

FIGURE 3 is an enlarged, fragmentary view showing the configuration of one of the spinning orifices.

Referring now in detail to the drawing, a spinning head 11 is shown provided with a plurality of concentric annular chambers 12, 13 and 14 which are separated by concentric annular walls 17 and 18 which are tapered to knife-like edges at their outer ends. A spinning plate 19 is secured to the spinning head 11 by a cap 22 which is 3,170,342 Patented Apr. 6, 1955 threaded onto the head 11. A bolt 23 extends through the center of the spinning plate 19 to further secure this plate to the head 11.

The spinning plate 19 is provided with a pair of concentric, annular V-shaped ridges or corrugations 24 and 25 the apexes of which are engaged by the walls 17 and 1 5, respectively. The apex of each V-shape ridge is provided with a plurality of spinning orifices 27 having the configuration illustrated in FIGURE 3. Each of the orifices 27 is conically counterbored as at 28 to provide for a free fiow of the spinning solutions past the knife edge.

A first spinning solution is fed through bores 30 and 31 from a source 32 into the chambers 12 and 14. A second spinning solution is fed through a bore 35 in the head 11 from a source 36 to the annular chamber 13. The two spinning solutions ilow past the tapered ends of the walls 17 and 18 and exit through the spinning orifices 27 as conjugate or composite filaments 38.

The V-shaped ridges or corrugations in the spinnerette plate 19 prevent this plate from bulging under pressure and thereby separating from the walls 17 and 18. Thus, accurate control of the flow of the two spinning solutions to the orifices 27 is assured. The bolt 23 further prevents bulging of the plate 19. However, the bolt 23 alone would not prevent bulging if the plate 19 was fiat in the area of the orifices 27.

It is to be understood that the embodiment disclosed herein is merely illustrative and that numerous other embodiments can be contemplated which will fall within the spirit and scope of the invention.

What is claimed is:

An apparatus for spinning filaments, comprising a spinning head having therein a plurality of concentric annular grooves separated by concentric annular walls having V-shaped outer ends, a circular spinnerette plate positioned on the head to cover the grooves therein, a cap attached to the head and having a portion engaging the outer edge of the spinnerette plate for holding said plate on the head, said plate having therein a plurality of concentric V-shaped corrugations having straight sides, said walls being aligned with and engaging the corrugations at the apexes thereof, said plate having therein a plurality of spinning orifices positioned at spaced intervals along said apexes, said head having therein a plurality of passageways leading to the annular grooves for the passage of spinning solutions thereto, and means located at the center of the plate for securing said center to said head.

References Cited by the Examiner UNITED STATES PATENTS 1,883,423 10/32 Taylor 188 2,386,173 10/45 Kulp et al 188 2,677,148 5/54 Webb 18---8 3,006,028 10/61 Calhoun l8-8 3,073,005 1/63 Tiede.

WILLIAM J. STEPHENSON, Primary Examiner. 

